Improvement in mortising-machines



H. CARTER.

MORTISING-MACHINE.

Patented May 22,1877.

rLPETERs. PHOTOYLITHOGRAPHER, WASHxNGToN, D C.

HENRY CARTER, OF AYLMER, ONTARIO, CANADA, ASSIGNOR OF ONE- HALF HIS RIGHT TO DANIEL STEWART, OF SAME PLACE..

lMPROVEl-MENT IN MORTISING-MACHINES.

Speccationforming part of Letters Patent N 0. 191,109, dated May 22, 1877; application tiled March 24, 1877.

To all whom it may concern Be it known that I, HENRY CARTER, of Aylmer, in the county of-Elgin, in the Province of Ontario,in the Dominion of Canada, have invented certain new and useful Improvements in Mortising-Machines and I do hereby declare that the following' is a full, clear, and exact description of the same.

This invention has for its object to out niortises by a vertical bit, rotating to and fro of the length of the mortise to be out, and boring vertically to a limited 'extent at each change of lateral cut, the chips falling from the mortise so soon as they are cut; and it consists- First, in a mortisingmachine, of a gate having vertical movement, and a frame having horizontal movement, carrying a rotary bit-holder, whereby the bit in the same is caused to bore vertically to a limited extent, and then, by movement of the frame, to cut horizontally the mortise from end to end laterally, until the depth of the mortise is attained, by a to-and-fro motion.

Second, in a mortising-machine, a gate 0perated by a pivoted frame having connection with a double ratchet-bar, and a pawl to give it vertical movement step by step, and a revolvin g bit-holder, to which a horizontal movement is given by a rack and pinion, operated by a rock-shaft having adjustable calipers lengaging with the pawl, whereby a vertical movement is given to the gate, alternating with a horizontal movement imparted to the bit-holder for cutting a mortise, lirst by the penetrating action of the bit, and, secondly, by its lateral cut intermittently to and fro in the mortise to the length and depth required.

Third, in a mortising-machine, a gate connected to a pivoted frame, having a weighted arm connected to a sliding double ratchet-bar on a fixed frame, having a rock-shaft provided with adjustable calipers, engaging with a pawl on said frame, and within the ratchetbar, whereby, by a rocking motion ot' thel shaft, the gate is elevated step by step.

Fourth, in a mortising-machine, in combination with a gate actuated and operating as set forth, a rotary bit-holder having horizontal motion imparted thereto by a rack-bar on a frame carrying the bit-holder, and a pinion on a rock-shaft actuating the rachet and pawl, whereby a to-and-fro motion" is given to the bit-holder between each intermittent motion of the gate vertically.

Figure l is a perspective view of my mortising-machine. Fig. 2 isa transverse section of the bit-holding frame. Fig. 3 is a longitudinal section of the bit-holder.

A is the table of the machine, on which the material to be mortised is placed between an adjustable guide-bar, a, and a cam, B, for

clamping the same. b are slides on the top'of the table, to gage the adjustment ofthe material to the longitudinal position required.' C is the gate retained to slide vertically by strips c, secured to the ends ot' the main frame of the machine. D is a tilting frame, pivoted to the ends of the machine, and connected by stirrups d to the lower bar of the gate O. The frame D has a projecting arm, e, which carries a counterpoise-weight, E. F is a frame sliding horizontally on upper and lower racebars f, whose ends are secured to the ends of the frame of Vthe machine, and to said frame F is attached a hollow shaft, G, provided with a belt drum, H, by which the machine is driven by means of a belt. The shaf't G incloses the bit-holder J, which is stepped to rotate in a slide-box, I, bearing on the lower rail ofthe gate C. The shaft G has a projection, It, engagingin a longitudinal slot or groove, g, in the bit-holder J, wherebyit slides vertically by the motion of the gate, and rotates by the motion of the drum H and shaft G.

K is a plate fixed to the main frame of the machine, on which plate slides vertically a double .ratchet-bar, L, having connection with the arm e ofthe frame D of the gate U by means of an arm, k, secured to the bar, and a connecting-rod, fm, attached to a slide-box on the arm e. nis a pawl pivoted to the plate K, to engage with the ratchets of the bar L, and which pawl is vibrated by calipers o 011 a rock-shaft, p, when said shaft is rocked by its handle r, which rocking has the effect of causing the ratchet-bar to drop step by step,

and allow of the depression ofthe weighted arm e, thusvlifting the gate C, and elevating the bit-holder and boring-bit, and causing the latter to penetrate thematerial to be mort-ised.

y On the rock-shaftp is a cog-pinion, q, which meshes with a rack-bar, S, for operating the frame F horizontally to the required length of the mortise, intermittently with the penetrating action of the boring-bit, thus causing the bit to cut laterally, and with a to-and-fro motion in the mortise to the extent of therequired depth of mortise.

The calipers are held adjnstablyon the rockshaft by a nut and collar, and they are set to any desired extension to operate the pawl, to allow-the pinion sufficient rotation to move the frame F to the distance corresponding-to the length of 'the mortise to be cut.

By the bit boring upwardly the chips cut fall from the mortise, and hence leaves the mortise clear to the cutting action of the vbit, either` vertically or horizontally. After each mortise has been cut the ratchet-bar Will have fallen to the distance corresponding to the depth of the mortise; it is then slid upwardly by hand before commencing another cut.

' The boring-bit screws into the top of the bit-holder, which is provided with a screwsocket, t, for such purpose, and the head of the shaft G is tted with a screw-cap, u, having a central aperture through which to pass the bit, the object of such screw-cap being to assist in steadying small bits.

I claim as my invention- 1. In a mortisng-machine, a gate, C, having vertical movement, and a frame, F, having horizontal movement,.each alternately operating a rotary bit-holder, J, whereby the bit is caused to bore vertically and cut horizontally, intermittently with its penetration, as set forth, for cutting a mortise.-

2. In combination with a bit-holder in a frame, .F, moving-horizontally, a gate, C, connected to a tilting frame, D, operated by rodconnection m, with a ratchet-bar, L, pawl n, vand a rock-shaft, p, provided with adjustable calipers o, whereby the gate is dropped step by step intermittently with the horizontal movement of 4the vframe F, as `set 1forth.

3. In combination with a gate, C, having an ntermittentmotion vertically, aframe, F, carrying a rotary bit-holder, J, having reciprocal motion horizontally, operated by'a rock-shaft, p, pinion-q, and rack-bar S, as ysetforth, whereby the frame is moved horizontally-at .each intermittent motion of the gate, asfdescribed.

4. In combinationfwith the frame F, havinghorizontal motion,and.lthe gate C, having vertical motion,.the hollow shaft G, provided with belt-drum H, and inclosing a bit-holder,

J, having sliding motion therein, lby means of theslot Q and projection h, as set forth.

HENRY CARTER. Signed inthe presence of- A. J. ELLIOTT, JAMES TURNER. 

